Are you sure all your settings are perfect. If so, then plz follow this
steps
./nodetool disablethrift
./nodetool disablegossip
./nodetool drain
stop the service and then delete the all data, saved_caches and commitlog
files. Then restart your service.
Repeat these steps for all the nodes. I hope it will work.
Regards,
--
Abhijit Chanda
VeHere Interactive Pvt. Ltd.
+91-9748888395